USB-C: genVIF: Cleanup and add support to pick static data from input

Removed few VIF properties which are being hardcoded
Updated the script to parse source VIF XML and add information to
the output
Added optional Kconfig option to configure custom source VIF XML path
Cleaned up the code

Signed-off-by: Madhurima Paruchuri <mparuchuri@google.com>
11 files changed